ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Mon Aug 13 00:19:55 2018 +0200| [dbac849c4db9c9378ab6e55f4f489debf2659b04] | committer: Michael Niedermayer
avcodec/lagarith: Optimize FRAME_SOLID_RGBA Changes 5466110 decicycles to 1798072 decicycles (tested with fate-suite/lagarith/lag-rgb32.avi) Fixes: Timeout Fixes: 9484/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LAGARITH_fuzzer-5707859156271104 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dbac849c4db9c9378ab6e55f4f489debf2659b04 --- libavcodec/lagarith.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c index 510a6ff2d6..3d3b4d41f4 100644 --- a/libavcodec/lagarith.c +++ b/libavcodec/lagarith.c @@ -572,8 +572,14 @@ static int lag_decode_frame(AVCodecContext *avctx, dst = p->data[0]; if (frametype == FRAME_SOLID_RGBA) { + int qwidth = avctx->width>>2; + uint64_t c = ((uint64_t)offset_gu << 32) | offset_gu; for (j = 0; j < avctx->height; j++) { - for (i = 0; i < avctx->width; i++) + for (i = 0; i < qwidth; i++) { + AV_WN64(dst + i * 16 , c); + AV_WN64(dst + i * 16 + 8, c); + } + for (i = 4*qwidth; i < avctx->width; i++) AV_WN32(dst + i * 4, offset_gu); dst += p->linesize[0]; } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
